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Article #2154Re: Phase detector for huge jitter ??
From: Tim Wescott
Date: Wed, 21 Apr 2004 17:23
Date: Wed, 21 Apr 2004 17:23
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Jim Thompson wrote: > On Wed, 21 Apr 2004 09:34:13 -0700, Tim Wescott > <tim@wescottnospamdesign.com> wrote: > > -- snip -- > Classic phase detectors fail on NRZ, but there are a variety of > methods to extract a clock from such messes. > > ...Jim Thompson Minor detail. Actually if you have data that "jitters" by 10-20T then you probably need to have a fast clock extraction loop that gives you a nice clean digital clock followed by a clock regeneration loop that can stand the huge phase difference, because all the edge detection schemes are digital, and all the clock extraction schemes have some very analog properties. -- Tim Wescott Wescott Design Services http://www.wescottdesign.com
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 112d1e,3cfe9391bca22339 X-Google-Attributes: gid112d1e,public X-Google-Thread: 112e71,3cfe9391bca22339 X-Google-Attributes: gid112e71,public X-Google-Thread: 107cee,3cfe9391bca22339 X-Google-Attributes: gid107cee,public X-Google-Thread: 103407,3cfe9391bca22339 X-Google-Attributes: gid103407,public X-Google-ArrivalTime: 2004-04-21 10:24:20 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!news.glorb.com!wn51feed!worldnet.att.net!216.168.1.162!sn-xit-02!sn-xit-01!sn-post-02!sn-post-01!supernews.com!corp.supernews.com!not-for-mail From: Tim Wescott <tim@wescottnospamdesign.com> Newsgroups: sci.electronics.design,de.sci.electronics,aus.electronics,sci.electronics.misc Subject: Re: Phase detector for huge jitter ?? Date: Wed, 21 Apr 2004 10:23:19 -0700 Organization: Posted via Supernews, http://www.supernews.com Message-ID: <108dbfpec2iua4@corp.supernews.com> User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.6) Gecko/20040113 X-Accept-Language: en-us, en MIME-Version: 1.0 References: <c66585$b9u$1@nemesis.news.tpi.pl> <ih6d80tp5je4djjbel7arquapcnur003m9@4ax.com> <108d8jmol9jtt01@corp.supernews.com> <po8d8017vhk7p91e95o8qegneaeo6v2d7o@4ax.com> In-Reply-To: <po8d8017vhk7p91e95o8qegneaeo6v2d7o@4ax.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@supernews.com Lines: 23